Ammonium Cyanate Shows N−H···N Hydrogen Bonding, Not N−H···O
Journal of the American Chemical Society2003Vol. 125(47), pp. 14449–14451
Citations Over TimeTop 14% of 2003 papers
E.J. MacLean, Kenneth D. M. Harris, Benson M. Kariuki, Simon J. Kitchin, Rik R. Tykwinski, I. P. Swainson, Jack D. Dunitz
Abstract
The transformation of ammonium cyanate into urea, first studied over 170 years ago by Wöhler and Liebig, has an important place in the history of chemistry. To understand the nature of this solid state reaction, knowledge of the crystal structure of ammonium cyanate is a prerequisite. Employing neutron powder diffraction, we demonstrate conclusively that, in the structure of ammonium cyanate, the NH(4)(+) cation forms N-H...N hydrogen bonds to four cyanate N atoms at alternate corners of a distorted cube, rather than our previously proposed alternative arrangement with N-H...O hydrogen bonds to cyanate O atoms at the other four corners.
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